Question: What is the x-coordinate of the local minimum of the parabola y = 2x^2 + 4x - 1?
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Question: Find the limit as x approaches 3 of (2x^2 - 7x + 4)/(x - 3).
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What are the characteristics of the circle function x^2 + y^2 = r^2? Is it always centered at the origin? Does it have a constant radius? Does it intersect the x and y axes? Does it have symmetry?